[OSM-dev] Multithread generate_tiles.py, generate_images.py and question about attribution.

[Dane Springmeyer]

On Oct 2, 2009, at 9:16 AM, Radek Bartoň wrote:

> Hello everyone.
>
> First of all, I want to share with my two scripts for Mapnik  
> rendering. First
> is a modified version of generate_tiles.py to use multithread  
> rendering.

Radek,

Very interesting work!

Jon recently added threading to generate_tiles.py in svn as well:

http://trac.openstreetmap.org/changeset/17484

I would if you have compared your implementation yet?

> Second
> is a modified generate_image.py to generate large bitmap posters  
> like [1,2]. It
> uses tiled rendering so it's possible to render very large areas  
> with high
> DPI.

Were you running into limitations within Mapnik or just memory when  
rendering large single images?

> Only limitation is that whole poster must fit into computer's memory
> during merging and texts drawing because I don't know any image  
> rendering
> library which can draw to memory mapped files or such. See scripts'  
> code and
> comments or ask for detailed information.
>

Great, I'll enjoy taking a look at this.
d
Cheers,

Dane